Sew-er-gate



I (No Model.)

J. DOWNS.

SEWER GATE.

No. 468,985. Patented Feb. 16, 1892.

UNITED- STATES PATENT OFFI JOHN DOVNS, OF SAN FRANCISCO, CALIFORNIA.

SEWER-GATE.

SPECIFICATION forming part of Letters Patent No. $8,985, dated February 16, 1892.

Application filed October 9, 1891. i

'be a full, clear, and exact description of the same.

, My invention relates to the classof doors or gates for sewers for the purpose of preventing the backfiow of tide or other water which may accumulate in the sewer and also to prevent sewer-gas passing from the main sewers into side sewers or house connections.

My invention consists in the peculiarlyconstructed gate or door hereinafter fully described, and specifically pointed outin the claims, and its novel location with respect to the sewer and its connections.

The object of my invention is to provide a simple and effective gate or door of this class especially adapted for side sewer,-and which will prevent the backwater from gettinginto said side sewers and will also answer fora trap prevent the sewer-gas from passing into and through said sewers into buildings or streetopenings which convey surface Waterinto the sewers.

Referring to the accompanying drawings for a more complete explanation of myinvention, Figure 1 is a perspective View of my gate or door. Fig. 2 is a vertical section of same. Fig. 3 is a sectionshowing it in place ina sewer.

The door or gate is made of an open-centered ring or frame A and a flap B, hinged to the frame A. These parts are preferably made of brass in order to resist the injurious action of saltwater and acids in the sewers, though they may be made of other material. The frame A is a ring-shaped piece formed with an inner flange a, an outer flange a, and an intervening ridge a The frame is also provided with lugs or brackets o and the flap B is provided with corresponding lugs or brackets b, and through said brackets a and b a pintle 0 passes, whereby the flap B-is suspended from and is hinged to the frame A. The diameter of the flap B is such that it laps well over and fits snugly against the inner flange a of the frame A and lies just Serial No. 403,255. I (No model.)

within the ridge a thereby forming'a close joint. The ridge a at its lower portion is out out or omitted, as shown at a, which is for the purpose of preventing the accumulation of dirt or other substances at that point, which would have a tendency to prevent the flap from closing tight. The frame A has also a top flange a extending inwardly at right angles. The flap B may have a bottom Weightlng b to insure its closing. The door or gate is located in the sewer as follows:

D is one piece of sewer-pipe, and E is the adjacent piece, the latter being made of greater diameter than the former in order to provide free and unobstructed space for the working of the flap. These two pipes fit together by the usual slip-joint;' but the pipe D has its end flange d made thicker than usual to providea firm bearing-surface for the frame A, and the socket c ofthe pipe E is made deeper than usual to receive the flange cl.

The frame Aof the door or gate is fitted to the face of the end flange d of pipe D, with its top flange a fitting over the top portion of said flange, and the frame is secured to the pipe by means of any usual cement, such as mortar or white or red lead. When the two pipes are fitted together, the outer flange a of the frame fits and is confined snugly between the meeting faces of the joint of the two pipes, and suitable cement intervening holds the frame well in place. The faces of the two pipes are made upon a slight angle, so that the flap B in a closed position does not quite reach the perpendicular, thereby providing for the firm closing by gravity of the flap against its seat in the frame A. The flap B Works freely into the larger pipe E, so that it can not be obstructed. This pipe E, as shown in Fig. 3, is the one which immediately joins the main sewer F. The pipes D- and E therefore form part of the side'sewer,

and the pipe E may properly be termed the protector for the gate or door, because it provides for the location of said gate or door outside of the main sewer, thereby preventing any contact of obstructing substances with it tending to disarrange it, as would be the case if it were located immediately within the main sewer; also, pipe E being larger,v

the water has an increased force of flow as it drops from pipe D, and this prevents dirt and ruli lbish from keeping the door from closing tig t.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is 1 1. A sewer gate or door consisting of an open-centered frame formed with an inner flange, an outer flange adapted to be confined between the meeting faces of adjacentpipes, and an intervening ridge, said ridge being cut away or omitted at its lower portion, and a flap hinged to the frame above and bearing against the inner flange thereof within the ridge, substantially as herein described.

2. A sewer gate or door consisting of an open-centered frame formed with an inner flange, an outer flange adapted to be confined between adjacent pipes, an intervening ridge, and with an upper flange a adapted to fit over the top of the end of the sewer-pipe, and a flap-hinged'to said frame and bearing against its inner flange within the ridge, substantially as herein described.

In combination with adjacent pipes of a sewer fitting together by a flange and socket, a gate or door having an outer flange a, adapted to be confined between the meeting faces of said pipes and provided with a ridge (1- and a flap hinged to said frame and adapted to work freely in one of said pipes to open H and close the opening in the gate, said flap adapted to lie within the ridge to form a close joint, substantially as herein described.

t. In combination with adjacent pipes of a sewer fitted together by a flange-and-socket joint, the plane of which is inclined from the hand.

vertical, a. gate having open center and inner 5. The pipes D and E of a sewer, said pipe said flap operating freely in the larger pipe E, substantially as herein described.

6. The pipe D and the larger pipe E, fitting together by a flange-and-socket joint, in combination with the open-centered frame A, having a. top flange a fitting over the top of the flange of pipe D, an outer flange a, confined between the meeting surfaces of the joint of said pipes, an inner flange a, an intervening ridge a and the flap B, hinged to said frame 'and bearing against the inner flange, a within the ridge a substantially as herein described. 1

7. The main sewer, the pipe D of the side sewer, and the pipe E, larger in diameter than the pipe D and forming the connection between the side sewer and the main sewer, in combination with the open-centered frame A, confined between the meeting surfaces of the joint of the pipes D and. E and provided with a ridge contiguous to the Walls ofthe opening, and the flap B, hinged to said frame and operating within the pipe E to open and close said frame and adapted to lie within the ridge to form a close joint, substantially as herein described. I

In witness whereof I have hereunto set my JOHN DOWVNS.

Witnesses:

S. H. NoURsE, J. A. BAYLESS. 

